AltairvsSegin
Altair has a higher Absolute Magnitude (2 vs -2 mag), while Altair has a higher Color Index (B-V) (0 vs 0), while Segin has a higher Luminosity (634 vs 11 × Sun).
Brightness
1
Apparent Magnitude
3
2
Absolute Magnitude
-2
11
Luminosity
634
Physical Properties
17
Distance
412
8,004
Surface Temperature
12,489
0
Color Index (B-V)
0
Position
20
Right Ascension
2
9
Declination
64
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Data sourced from HYG Database (Free for any purpose, including commercial).